/*
 * Copyright � 2002-2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Runtime.Serialization;
using System.Security.Permissions;

namespace Spring.Aop;

/// <summary>
/// Canonical <see cref="Spring.Aop.ITypeFilter"/> instances.
/// </summary>
/// <remarks>
/// <p>
/// Only one canonical <see cref="Spring.Aop.ITypeFilter"/> instance is
/// provided out of the box. The <see cref="TrueTypeFilter.True"/>
/// <see cref="Spring.Aop.ITypeFilter"/> matches all classes.
/// </p>
/// </remarks>
/// <author>Rod Johnson</author>
/// <author>Aleksandar Seovic (.NET)</author>
[Serializable]
public sealed class TrueTypeFilter : ITypeFilter, ISerializable
{
    /// <summary>
    /// Canonical <see cref="Spring.Aop.ITypeFilter"/> instance that
    /// matches all classes.
    /// </summary>
    public static readonly ITypeFilter True = new TrueTypeFilter();

    /// <summary>
    /// Creates a new instance of the
    /// <see cref="TrueTypeFilter"/> class.
    /// </summary>
    /// <remarks>
    /// <p>
    /// This is a utility class, and as such has no publicly visible
    /// constructors.
    /// </p>
    /// </remarks>
    private TrueTypeFilter()
    {
    }

    /// <summary>
    /// Should the pointcut apply to the supplied
    /// <see cref="System.Type"/>?
    /// </summary>
    /// <param name="type">
    /// The candidate <see cref="System.Type"/>.
    /// </param>
    /// <returns>
    /// <see langword="true"/> if the advice should apply to the supplied
    /// <paramref name="type"/>
    /// </returns>
    /// <seealso cref="Spring.Aop.ITypeFilter.Matches(Type)"/>
    public bool Matches(Type type)
    {
        return true;
    }

    /// <summary>
    /// A <see cref="System.String"/> that represents the current
    /// <see cref="Spring.Aop.ITypeFilter"/>.
    /// </summary>
    /// <returns>
    /// A <see cref="System.String"/> that represents the current
    /// <see cref="Spring.Aop.ITypeFilter"/>.
    /// </returns>
    public override string ToString()
    {
        return "TrueTypeFilter.True";
    }

    /// <inheritdoc />
    [SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.SetType(typeof(TrueTypeFilterObjectReference));
    }

    [Serializable]
    private sealed class TrueTypeFilterObjectReference : IObjectReference
    {
        public object GetRealObject(StreamingContext context)
        {
            return TrueTypeFilter.True;
        }
    }
}
